CN103409698B - A kind of steel alloy and make the method for torsion shaft with this kind of steel - Google Patents
A kind of steel alloy and make the method for torsion shaft with this kind of steel Download PDFInfo
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- CN103409698B CN103409698B CN201310374101.0A CN201310374101A CN103409698B CN 103409698 B CN103409698 B CN 103409698B CN 201310374101 A CN201310374101 A CN 201310374101A CN 103409698 B CN103409698 B CN 103409698B
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Abstract
The present invention relates to a kind of torsion axle-steel and make the method for torsion shaft with this kind of steel, solve the problem that current steel torsion shaft intensity is low.Torsion shaft steel is 40Si2Ni2CrMoV, alloying element composition and proportioning are: C:0.35-0.5, Si:1.5-2.3, Mn :≤0.05, Cr:0.5-1.5, Ni:0.8-3.5, Mo:0.4-0.8, Ca:0.0005-0.008, P :≤0.010, the Nb of V and 0.02-0.06 of Nb or 0.05-0.15 of V or 0.02-0.1 of S :≤0.005,0.05-0.2, all the other are Fe and impurity.Manufacture the method for torsion shaft, comprise the following steps: forging-machine adds unskilled workman-thermal treatment-Finishing Parts Machining-finish rolling hardening-turn round by force, and steel of the present invention, except for the manufacture of except torsion shaft, also can be used as the use of high-quality spring steel.
Description
Technical field
The present invention relates to a kind of steel alloy and make the method for torsion shaft with this kind of steel.
Background technology
At present, China's Tank and Armoured Vehicle torsion shaft material is 45CrNiMoVA steel alloy, and normative heat treatment technique is: 860 DEG C of oil quenchings and about 460 DEG C average tempering process, tensile strength is at about 1500MPa.Along with the weight of Tank and Armoured Vehicle is increasing, more and more higher again to the requirement of the maneuvering characteristics of car load, existing 45CrNiMoVA steel alloy performance can not adapt to torsion shaft design requirement.China started to produce tank from 1958, and four during the last ten years, and tank car weight is increased to 55 tons of equipment on Active Duty from early stage 36 tons.By constantly deep-cutting the potential of 45CrNiMoVA steel torsion shaft material, technique is taked reduction tempering heat treatment temperature sacrifice toughness index gain in strength the demand met intensity index, cause the factor of assurance of 45CrNiMoVA steel torsion shaft intensity to fall lower and lower with the increase of tank car weight.Torsion shaft early fracture failure phenomenon in various degree is all there is in the Multiple Type equipments such as active service main battle tank, light tank and tracked armored vehicle.
Summary of the invention
The present invention, by providing a kind of material to be the steel alloy of 40Si2Ni2CrMoV and manufacturing the method for torsion shaft with this kind of material, solves the problem that current 45CrNiMoVA steel torsion shaft intensity is low, can not adapt to design requirement.
The present invention is realized by following technical scheme:
A kind of steel alloy, material is 40Si2Ni2CrMoV, its alloying element composition and proportioning (weight percent) as follows:
C:0.35-0.5, Si:1.5-2.3, Mn :≤0.05, Cr:0.5-1.5, Ni:0.8-3.5, Mo:0.4-0.8, Ca:0.0005-0.008, P :≤0.010, S :≤0.005, all the other are Fe and impurity, in addition, and the Nb of the Nb of V or 0.02-0.1% of above-mentioned alloying constituent also containing 0.05-0.2% or V and 0.02-0.06% simultaneously containing 0.05-0.15%.
Manufacture a method for torsion shaft with above-mentioned steel alloy, comprise the following steps: forging-roughing-thermal treatment-Finishing Parts Machining-finish rolling hardening-turn round by force, concrete grammar is as follows:
(1) forging process:
At initial forging temperature 1300 DEG C, be incubated 40 minutes, carry out upset; Carry out normalizing thermal treatment after forging, normalizing temperature is 900 DEG C of insulations, 3.5 hours air coolings, and tempering temperature is 650 DEG C of insulations 5.0 hours, air cooling of coming out of the stove, then carries out destressing tempering, and tempering temperature is 500 DEG C, is incubated air cooling after 4.0 hours;
(2) blank roughing:
Blank after forging is carried out roughing;
(3) thermal treatment:
Torsion shaft after roughing is heat-treated, i.e. highly malleablized process, the austenitizing temperature of torsion shaft quenching is 880 ± 20 DEG C, soaking time is 4 hours, and quenchant is quenching oil, then temper, oil temperature is 50 ± 10 DEG C, tempering temperature is 300 ± 20 DEG C, soaking time 3 hours, air cooling of coming out of the stove;
(4) Finishing Parts Machining:
Torsion shaft after thermal treatment is carried out grinding precision work;
(4) finish rolling hardening:
After completing highly malleablized process, carry out surface rolling strengthening;
(5) turn round by force:
Concrete technology is: first road windup-degree 162 ± 1 °, reverses to 162 ± 1 ° after unloading again, and so repeatedly, reversing total degree is 6 times; Secondary windup-degree 120 ± 1 °, reverses after unloading to 120 ± 1 ° again, and so repeatedly, reversing total degree is 4 times, after multi-pass turns round process by force, and torsion shaft reaches its maximum twist angle 180-220 °.
The nominal-ultimate strength scope of steel alloy of the present invention is 1600-2000MPa.Compared with existing torsion shaft steel 45CrNiMoV steel, not only strength level brings up to 1600MPa level from 1500MPa level, and fracture toughness property improves 30%, and shearing resistance improves 10%, and torsional fatigue limit improves more than 15%.Meanwhile, good mechanical performance, smelting process are simple, and fatigue lifetime is long, improves supporting capacity and the maneuvering ability of Tank and Armoured Vehicle.
Steel grade of the present invention, except for the manufacture of except torsion shaft, also can be used as high-quality spring steel and uses.
Embodiment
A kind of steel alloy of the present invention, material is 40Si2Ni2CrMoV, its alloying element composition and proportioning (weight percent) as follows:
C:0.35-0.5, Si:1.5-2.3, Mn :≤0.05, Cr:0.5-1.5, Ni:0.8-3.5, Mo:0.4-0.8, Ca:0.0005-0.008, P :≤0.010, S :≤0.005, all the other are Fe and impurity.In addition, the Nb of the Nb of V or 0.02-0.1% of above-mentioned alloying constituent also containing 0.05-0.2% or V and 0.02-0.06% simultaneously containing 0.05-0.15%.Carry out Ca process by the Mn content that reduces in steel and when smelting, make inclusion in steel with particulate state CaS formal distribution in austenite crystal, avoid the MnS along crystal boundary to separate out, thus significantly improve fracture toughness property.Concrete smelting technology can adopt one of following three kinds of flow processs:
1, starting material preparation-electric arc furnace smelting-external refining (LF+VD/RH)-ESR ingot-ESR ingot heats forged smelted-pour into a mould by cast electrode-electric slag remelting furnace or rolling is become a useful person-annealed.
2, starting material preparation-converter smelting-external refining (LF+VD/RH)-ESR ingot-ESR ingot heats forged smelted-pour into a mould by cast electrode-electric slag remelting furnace or rolling is become a useful person---annealing.
3, starting material preparation-vacuum induction furnace smelting-water injecting electrode or cast steel ingot are forged into electrode-electric slag remelting furnace again and smelt-pour into a mould ESR ingot-ESR ingot heats forged or rolling is become a useful person-annealed.
For strict control S, P content, starting material adopt the metal or alloy material of low S, P content.Vacuum induction melting is mainly the cleanliness factor promoting steel, and outstanding behaviours is on S content and P content, and annealing temperature is 600-800 DEG C.
Adopt electroslag remelting process that the remelting of 40Si2Ni2CrMoV steel alloy φ 510mm electrode bar is become φ 660mm steel ingot, electroslag whole process adopts argon shield.
By the method for above-mentioned torsion shaft steel making torsion shaft, comprise the following steps: forging-roughing-thermal treatment-Finishing Parts Machining-finish rolling hardening-turn round by force, concrete grammar is as follows:
(1) forging process:
At initial forging temperature 1300 DEG C, be incubated 40 minutes, carry out upset; Carry out normalizing thermal treatment after forging, normalizing temperature is 900 DEG C of insulations, 3.5 hours air coolings, and tempering temperature is 650 DEG C of insulations 5.0 hours, air cooling of coming out of the stove, then carries out destressing tempering, and tempering temperature is 500 DEG C, is incubated air cooling after 4.0 hours;
(2) blank roughing:
Blank after forging is carried out roughing;
(3) thermal treatment:
Torsion shaft after roughing is heat-treated, i.e. highly malleablized process, the austenitizing temperature of torsion shaft quenching is 880 ± 20 DEG C, soaking time is 4 hours, and quenchant is quenching oil, then temper, oil temperature is 50 ± 10 DEG C, tempering temperature is 300 ± 20 DEG C, soaking time 3 hours, air cooling of coming out of the stove;
(4) Finishing Parts Machining:
Torsion shaft after thermal treatment is carried out grinding precision work;
(4) finish rolling hardening:
After completing highly malleablized process, carry out surface rolling strengthening;
(5) turn round by force:
Concrete technology is: first road windup-degree 162 ± 1 °, reverses to 162 ± 1 ° after unloading again, and so repeatedly, reversing total degree is 6 times; Secondary windup-degree 120 ± 1 °, reverses after unloading to 120 ± 1 ° again, and so repeatedly, reversing total degree is 4 times, after multi-pass turns round process by force, and torsion shaft reaches its maximum twist angle 180-220 °.
Torsion shaft manufacturing process of the present invention is turned round by force two portions by highly malleablized process and multi-pass and is formed, and particularly multi-pass turns round by force the enforcement of technique, once turning round by force compared with moulding process, significantly can promote the work-ing life of torsion shaft with adopting maximum twist angle traditionally.
By carrying out Endurance life test and destructive test to new material alloy steel of the present invention, result shows: material be 40Si2Ni2CrMoV steel alloy torsion shaft dynamic torsional angle be 70 ° of (torsion(al)angle scope is 12.5 ° ~ 83.0 °), number of torsions be all greater than 45000 times time, carry out endurance test, maximum remnants deform angle is 2.11 °.When dynamic torsional angle is 79 ° (torsion(al)angle scope is 8.1 ° ~ 87.0 °), carry out destructive test, reverse to 84225 times disrumpent feelings, index is obviously better than existing material 45CrNiMoVA steel.Experimental result shows: novel alloy steel of the present invention can significantly improve the service life of Tank and Armoured Vehicle torsion shaft, promotes the overall maneuvering characteristics of Tank and Armoured Vehicle, meets suspension index request life.
Claims (1)
1., by a method for torsion shaft steel making torsion shaft, torsion shaft steel is 40Si2Ni2CrMoV steel alloy, its alloying element composition and proportioning (weight percent) as follows:
C:0.35-0.5, Si:1.5-2.3, Mn :≤0.05, Cr:0.5-1.5, Ni:0.8-3.5, Mo:0.4-0.8, Ca:0.0005-0.008, P :≤0.010, S :≤0.005, the Nb of the Nb of V or 0.02-0.1 of 0.05-0.2 or V and 0.02-0.06 simultaneously containing 0.05-0.15, all the other are Fe and impurity;
It is characterized in that: comprise the following steps by the method for above-mentioned torsion shaft steel making torsion shaft: forging-roughing-thermal treatment-Finishing Parts Machining-finish rolling hardening-turn round by force, concrete grammar is as follows:
(1) forging process:
At initial forging temperature 1300 DEG C, be incubated 40 minutes, carry out upset; Carry out normalizing thermal treatment after forging, normalizing temperature is 900 DEG C of insulations, 3.5 hours air coolings, and tempering temperature is 650 DEG C of insulations 5.0 hours, air cooling of coming out of the stove, then carries out destressing tempering, and tempering temperature is 500 DEG C, is incubated air cooling after 4.0 hours;
(2) blank roughing:
Blank after forging is carried out roughing;
(3) thermal treatment:
Torsion shaft after roughing is heat-treated, i.e. highly malleablized process, the austenitizing temperature of torsion shaft quenching is 880 ± 20 DEG C, soaking time is 4 hours, and quenchant is quenching oil, then temper, oil temperature is 50 ± 10 DEG C, tempering temperature is 300 ± 20 DEG C, soaking time 3 hours, air cooling of coming out of the stove;
(4) Finishing Parts Machining:
Torsion shaft after thermal treatment is carried out grinding precision work;
(4) finish rolling hardening:
After completing highly malleablized process, carry out surface rolling strengthening;
(5) turn round by force:
Concrete technology is: first road windup-degree 162 ± 1 °, reverses to 162 ± 1 ° after unloading again, and so repeatedly, reversing total degree is 6 times; Secondary windup-degree 120 ± 1 °, reverses after unloading to 120 ± 1 ° again, and so repeatedly, reversing total degree is 4 times, after multi-pass turns round process by force, and torsion shaft reaches its maximum twist angle 180-220 °.
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| CN201310374101.0A CN103409698B (en) | 2013-08-26 | 2013-08-26 | A kind of steel alloy and make the method for torsion shaft with this kind of steel |
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| CN201310374101.0A CN103409698B (en) | 2013-08-26 | 2013-08-26 | A kind of steel alloy and make the method for torsion shaft with this kind of steel |
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| CN103409698B true CN103409698B (en) | 2015-09-02 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105369150B (en) * | 2014-08-27 | 2017-03-15 | 宝钢特钢有限公司 | A kind of superhigh intensity armor manufacture method |
| CN105090304B (en) * | 2015-08-18 | 2019-05-28 | 山东德泰机械制造集团有限公司 | A kind of steel alloy or spring steel auxiliary spring support |
| CN106011619A (en) * | 2016-06-07 | 2016-10-12 | 东北特钢集团大连特殊钢有限责任公司 | Manufacturing method of SXQ550D-Z35 forged thick plate for fixed guide vane |
| CN107974629A (en) * | 2017-11-27 | 2018-05-01 | 长沙黑金刚实业有限公司 | A kind of drilling tool steel, its preparation method and drilling tool |
| CN110777238A (en) * | 2019-12-10 | 2020-02-11 | 中国兵器工业新技术推广研究所 | Torsion shaft and heat treatment process and preparation method thereof |
| CN110977353A (en) * | 2019-12-19 | 2020-04-10 | 上海交通大学 | Manufacturing method of torsion shaft |
| CN112281053B (en) * | 2020-09-21 | 2022-03-01 | 中国石油天然气集团有限公司 | SiMnCrNiMo low-carbon martensitic steel, drilling machine hoisting ring and manufacturing method thereof |
| CN112589391A (en) * | 2020-12-08 | 2021-04-02 | 北京星航机电装备有限公司 | Method for manufacturing slender torsion bar spring |
| CN113265526A (en) * | 2021-04-27 | 2021-08-17 | 北京理工大学 | Numerically-controlled machine tool for assisting rolling reinforcement of torsion shaft torsion stress field and reinforcement method |
| CN114669699A (en) * | 2022-03-23 | 2022-06-28 | 北京少仕科技有限公司 | Torsion shaft manufacturing method |
| CN114653869A (en) * | 2022-03-23 | 2022-06-24 | 北京少仕科技有限公司 | Manufacturing process of torsion shaft |
Citations (3)
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| JP2001288539A (en) * | 2000-04-05 | 2001-10-19 | Nippon Steel Corp | Spring steel excellent in hydrogen fatigue resistance and its production method |
| CN1958828A (en) * | 2005-11-02 | 2007-05-09 | 株式会社神户制钢所 | Spring steel with excellent resistance to hydrogen embrittlement and steel wire and spring obtained from the steel |
| CN101270453A (en) * | 2008-05-21 | 2008-09-24 | 钢铁研究总院 | Ultrahigh-strength thermal forming martensitic steel |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001288539A (en) * | 2000-04-05 | 2001-10-19 | Nippon Steel Corp | Spring steel excellent in hydrogen fatigue resistance and its production method |
| CN1958828A (en) * | 2005-11-02 | 2007-05-09 | 株式会社神户制钢所 | Spring steel with excellent resistance to hydrogen embrittlement and steel wire and spring obtained from the steel |
| CN101270453A (en) * | 2008-05-21 | 2008-09-24 | 钢铁研究总院 | Ultrahigh-strength thermal forming martensitic steel |
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Effective date of registration: 20161209 Address after: 014030 Baotou rare earth hi tech Industrial Development Zone, the first functional area of the Inner Mongolia Autonomous Region Patentee after: Baotou Beifang Venture Co., Ltd. Patentee after: Central Iron & Steel Research Institute Address before: 014032 Baotou, Castle Peak District, the Inner Mongolia Autonomous Region, No. two mailbox Patentee before: Inner Mongolia First Machinery Group Corporation Patentee before: Central Iron & Steel Research Institute |
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Address after: 014032, Baotou, Inner Mongolia two mailbox technology and Information Technology Department Co-patentee after: Central Iron & Steel Research Institute Patentee after: Inner Mongolia First Machinery Group Limited by Share Ltd Address before: 014030 Baotou rare earth hi tech Industrial Development Zone, the first functional area of the Inner Mongolia Autonomous Region Co-patentee before: Central Iron & Steel Research Institute Patentee before: Baotou Beifang Venture Co., Ltd. |